We know the problems, and we know the solution: sustainable development. The issue is the political will.

I think people think their incomes have been flat lining for a long period of time. They feel that the next generation's opportunities are not going to be improvement. So and I also think that social media then allows insurgent movements to gain scale at speed.

There are big questions about the sort of skills you need in modern government today. You put politicians in charge of billions of dollars with absolutely no training and very little support system around them. It's an extraordinary thing.

But the world is ever more interdependent. Stock markets and economies rise and fall together. Confidence is the key to prosperity. Insecurity spreads like contagion. So people crave stability and order.

I mean, you can agree or disagree with Iraq or Afghanistan, but by the way, now the great campaigning cause out there is the absence of intervention in Syria. And then in Libya, it's partial intervention. And that doesn't really explain why some countries that have literally nothing to do with the interventions in the Middle East end up getting targeted.

The intelligence is clear: (Saddam) continues to believe his WMD programme is essential both for internal repression and for external aggression.

September 11 was, and remains, above all an immense human tragedy. But September 11 also posed a momentous and deliberate challenge not just to America but to the world at large. The target of the terrorists was not only New York and Washington but the very values of freedom, tolerance and decency which underpin our way of life.